What works best: Privates vs. Dorms

Hello! First time poster, long time reader.

I am currently in the process of opening a hostel in Merida, Yucatan. I have found a lot with about 4,100 sq ft to house about 60 people. This will be a semi-luxe hostal with higher-end accomodations for those looking for a hostel environment for a bit higher cost. 

Currently working on the layout and I am wondering what kind of layout will bring me the fastest ROI: should we focus on more dorms and fewer individual rooms or the oppostie? What has worked best in the past for you all? I have done a lot of research but cannot find an answer for this type of question so I figured I should make a post!

Any insight is appreciated :)